package com.guo.boot.study.thread;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @Auther Heart Guo
 * @Date 2021/12/23-14:13
 */
//模拟倒计时
public class TestSleep2 {
    public static void main(String[] args) {
        /*try {
            tenDown();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }*/

        //打印当前时间
        Date startDate = new Date(System.currentTimeMillis());//获取系统当前时间

        while (true){
            try {
                Thread.sleep(1000);
                System.out.println(new SimpleDateFormat("HH:mm:ss").format(startDate));
                startDate = new Date(System.currentTimeMillis());//更新当前时间
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }


    public static void tenDown() throws InterruptedException {
        int num = 10;

        while (true){
            Thread.sleep(1000);
            System.out.println(num--);
            if(num<=0){
                break;
            }
        }

    }
}
